The flat file’s deepest layer speaks.
Consider a financial VM. In 2018, a spreadsheet bonus.xls sits at LBA 1,234,567. In 2021, that sector is overwritten by a log file entry. But in 2022, a crash leaves the log unwritten. A forensic carve reveals the remnants of the spreadsheet: a few rows of salaries, half a pivot table. vmdk flat file
: The file claims 40GB on disk, but the datastore is thin. The flat file cannot know it’s actually scattered across three physical drives. It believes it is continuous. A noble lie. 4. The Cloning and the Ghost Twins A vmkfstools -i source-flat.vmdk clone-flat.vmdk — and the flat file is duplicated, byte-for-byte. Now two separate VMs believe they own the same past. Each will diverge. The flat file’s deepest layer speaks
When you mount me read-only, I show you the past. When you write to me, I forget something else. My zeroed blocks are not empty — they are the absence of a story you chose to end. In 2021, that sector is overwritten by a log file entry
When a guest OS deletes a file, it merely unlinks an inode. The flat file’s sectors remain pristine with the old data — a photograph of a document that was “shredded.” Over time, new writes overlay these sectors. But until overwritten, the ghost persists.